Method of making spring insertions



- March 10, 1942. G, TQROK' 2,276,002

METHOD OF MAKING SPRING INSERTIONS 2 Original Filed Jan. 12, 1939 2 sheets sheet 1 March 10, 1942. G. T6RC5K METHOD OF MAKING SPRING INSERTIONS Original Filed Jan. 12 1939 2 Sheets-Shea; -2

Patented Mar. 10, 1942 UNITED STATES PAT A 2,276,002- r orrice 2,276,002 METHOD or MAKING SPRING msnnrrons Original application January 12, 1939, Serial No.

250,505. Divided and this application April 12,

1941, Serial No. 28, 1938 Claims.

This invention relates to a method of making cylindrical springs, more particularly, to a method of making spring insertions for stuffed seats, mattresses, cushions and the like.

The method according to the invention herein presents substantial advantages over the known methods, in that it enables the building up of the upholstery springs without having to invert the spools or other devices employed, from which the helices of the spring wire are detached. In this way, the excessive distortion of the wire by twisting at the places of transition and thereby the weakening of the wire at these points can be avoided. Moreover, no inflexion occurs in the zones of the connecting wires between the adjacent upholstery springs. Each zone is positioned in the recesses between two upholstery springs, and that makes it possible to anchor therein linking members for bridging over the cavities formed between each four upholstery springs. Besides, the construction of the spring insertion according to the invention herein assures firm and mutual positioning of the uppermost and lowermost turns of the upholstery springs at the two surfaces, while in the known spring insertions, the rather loose connection of these helices caused sagging and similar drawbacks. From this point of view, an additional advantage of the spring insertion according to the invention herein is also of importance. This consists in the possibility of fastening every border spring of the insertion to the well-known holding frames along their outer wire portions, in distinction to other spring insertions in which every second spring of the bordering spring rows only could be fastened to the frame.

In the drawings:

Fig. 1 shows a top plan view of two spring rows consisting of four springs, each connected in accordance with the invention.

Fig. 2 is a perspective View of a spring row, consisting of six springs which also shows the intertwining of the turns of the spring.

Fig. 3 shows a top plan view of another embodiment of the spring rows in accordance with the invention.

Fig. 4 is a perspective view of the spool or device used to form the improved insertion.

Fig. 5 is a front elevation of a spring insertion formed by the improved method.

Figs. 1 and 2 show two spring rows, each consisting of four springs or to or, the individual springs in each row being connected by means of bent wire portions 61, di and dz, integral with the wire from which the springs are also made. The direction of the helices of any of the springs in each row is opposite with regard to both adjacent springs when viewed from their top plane. Thus when viewed from that plane, the direction of the helix of the spring (12 is clockwise, whereas Hungary January the direction of the helices of the adjoining springs c1 and a3 is counter-clockwise. Thewire portions connecting the springs lie alternately at the top ends 12 and d2 and respectively at the bottom end 111 of the spring. These connecting wire portions are arcuate according to Figs. 1 and 2. They may however, be of any desired shape and may also be straight. In any case, the connecting wire portions are formed with the adjoining spring recesses, in which buckles e, or other linking elements (such as metal bands, wires, straps, cords, or the like) can be anchored, to bridge over the cavities formed within four adjoining springs.

Fig. 2 difiers from the construction of Fig. l in that the helices of the adjoining springs are intertwined in the known manner. v The axes of the upholstery springs of one and the same spring row according to Fig. 1, lie in a straight line. However, according to Fig. 3 they may lie in a zig-zag line, that is, the successive springs formed of a wire length are located in different spring rows of the spring wire insertion. For example, springs i and g, shown in full line in Fig. 3, are located in the second spring row of the spring insertion, whereas the springs 7, h and 1 spring insertion. The vacant places in the rows are filled up by the springs of another succession of springs shown in dotted lines.

In making the spring wire insertion according to the improved method, the wire 2 which is of such a length that it is sufiicient for the production of a greater number of springs (see Fig. 4) is wound onto a spool I, the outer diameter of which is preferably smaller than the diameter of the spring to be produced. The end 2| 'of the wire 2 is fixed to a frame holding the spring:

wire insertion and the spool l is kept in such a position that its geometric axis is'parallelto the geometric axis 0101 of the spring an to be formed (see Fig. 5). around its geometric axis is displaced vertically to its axis to a distance at which it reaches the place which will be occupied by the spring m in the spring wire insertion. Thereupon, the spool held at its lower disc 4 is moved in the direction 01-01 as indicated by the arrow x.

For facilitating the withdrawal of the wire, the spool may meanwhile perform a precessional movement, that is, a rocking movement around its axis of precession, whereby the wire helices are removed from the spool along the border of the bottom disc 4. Such a number of turns is thus withdrawn from the spool, which is to constitute the spring m, for example, four turns according to Fig. 5. Owing to the fact that the wire is generally wound around spool l in several layers, the diameter of the helices of the individual layers are different, so that they in any case are located in the first row of the Then the spool, while rolled deviate from the diameter of the helices of the springs to be produced. The final diameter of the spring m can be obtained in such manner that the greatest diameter of the spring wire on the spool is so adjusted as to be smaller than the desired diameter of the spring a1, and during the withdrawal of the helices from the spool, the diameter of the wire spring can be increased by deformation to the desired size.

After having completed spring (11 in this manner, spool l reaching the level of the upper end of the spring a1, is displaced in a direction which is normal to its axis to such a distance that its axis should coincide with the direction 02-02 of the axis of the next spring a2 (see Fig. Meanwhile the spool, without being inverted, is rolled around its axis to such an extent that a wire portion corresponding to the length of the connecting portion d between springs (11 and a2 is unwound from the spool. Thereupon, the spool held at its lower disc 4, is moved in the direction of axis 02O2 as indicated by the arrow 1 whereby the wire is firmly held at the portion d. Thereby, the wire helices on the spool are detached therefrom along the border of the top disc 3, as illustrated in Fig. 4 in dotted lines.

After the spring a2 has been completed in the same manner as has already been described in connection with the spring 111, the spool reaches the level of the lower end of the spring on. After the spring a2 had been produced in a downward direction, the spool, in order to produce the next spring as in an upward direction, is displaced again in a direction normal to its axis to such distance that its axis should coincide with the axis 030 of the next spring. Thereby, the spool without being inverted is rolled anew around its axis for such a duration of time that a length of wire necessary for forming a wire portion (11 connecting the lower end of the spring as with the lower end of the next spring as to be made in an upward direction, should be withdrawn. Thereupon, after fastening the wire portion (11, the method is continued in a manner as has already been described in connection with the making of spring 111. During the production of the springs, the spool is alternatively moved up and down, whereby the geometric axis and respectively the axis of the precession cone of the spool always remains parallel to itself, that is, it does not undergo any inversion.

When viewing the adjacent springs, for example, in the direction of arrow :1: (see Fig. 5),

then starting from the front plane 2-2 of inspection, the direction of winding of the middle spring as marked with an arrow, is opposite to that of both adjoining springs (11 and as.

This application is a division of application Serial No. 250,505, filed January 12', 1939.

I claim:

1. A method for the manufacture of spring insertions for stuffed seats, mattresses, cushions or the like, in which more than two upholstery springs are arranged substantially axially parallel to one another, comprising withdrawing wire axially in one direction from a spool having turns of wire wound thereon, sufiicient to form a first spring, withdrawing a sufficient length of wire laterally of the spool to form a connecting piece between said first spring and a second spring to be formed, and forming the second spring by withdrawing sufiicient turns of wire axially of the spool in a direction opposite to said firstmentioned direction.

2. A method for the manufacture of spring insertions for stuffed seats, mattresses, cushions or 1 the like in which more than two upholstery springs are arranged substantially axially parallel to one another, comprising withdrawing wire from a spool having turns of wire wound thereon, including the steps of withdrawing axially oi the spool in one direction sufiicient turns of wire to form a first spring, withdrawing a sufiicient length of wire laterally of the spool to form an inwardly recessed connecting piece of bent wire between said first spring and a second spring to be formed, and forming the second spring by withdrawing sufiicient turns of wire axially of the spool in a direction opposite to said first-mentioned direction.

3. A method for the manufacture of spring insertions for stufied seats, mattresses, cushions or the like in which more than two upholstery springs are arranged substantially axially parallel to one another, comprising withdrawing wire from a spool having turns of wire wound thereon, including the steps of withdrawing axially of the spool in one direction suflicient turns of wire to form a first spring, withdrawing a sufficient length of wire laterally of the spool to form an inwardly recessed connecting piece of bent wire between said first spring and a second spring to be formed, and forming the second spring by withdrawing sufficient turns of wire axially of the spool in a direction opposite to said firstmentioned direction, and finally bridging over the spaces formed between adjacent connecting pieces of adjacent spring rows by means of strips.

4. A method for the manufacture of spring insertions for stuffed seats, mattresses, cushions or the like, in which more than two upholstery springs are arranged substantially axially parallel to one another, comprising withdrawing wire axially in one direction from a spool having turns of wire wound thereon sufiicient to form a first spring, withdrawing a sufiicient length of wire laterally of the spool to form a connecting piece between said first spring and a second spring to be formed, and forming the second spring by withdrawing sufficient turns of wire axially of the spool in a direction opposite to said firstmentioned direction and passing each turn of the second spring through the adjacent turn of the first spring.

5. A method for the manufacture of spring insertions for stuffed seats, mattresses, cushions or the like in which more than two upholstery springs are arranged substantially axially parallel to one another, comprising withdrawing wire from a spool having turns of wire wound thereon, including the. steps of withdrawing axially of the spool in one direction sufficient turns of wire to form a first spring, withdrawing a sufficient length of wire laterally of the spool to form an inwardly recessed connecting piece of bent wire between said first spring and a second spring to be formed, and forming the second spring by,

withdrawing sufficient turns of wire axially of the spool in a direction opposite to said firstmentioned direction and threading each turn of the second, spring through the adjacent turn of the first spring to intertwine the coils of adjacent springs.

GEORGE 'ronox. 

